Improved oee-oeushee and geffldee



@with Sgt-etre flatmt @fitta SEYMOUR HUGHES, OF SAN FRANCISCO, CALIFORNIA.

Letters Patent No. 76,461, dated April 7, 1868.

IMPROVED ORE-GRUSEEB. AND GRINDBR. l

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'lO ALL WHOM IT MAIZ OONOERN:

Bc it known'that I, SEYMOUR HUGHES, of the city and county of San lllraneiseo, State of California, have invented an Improved Ore-Crusher and Grinder; and I do hereby declare the following description and aecompanying drawings are suihcient to enable any person skilled in the art or science to which it most nearly appertains to make and use my said invention or improvement without further invention or experiment.

The object of my invention is to provide an improved ore-crusher and grinder in which the pulverizing, as usually performed by stamps, and the grinding, as effected by various devices, shall both bc performed in one machine, which is so compactly made that it occupies much less space than the machines now in use. It consists of a circular base, above or on the top of which is a series of four or more inclined planes, each having a die at its base. Heavy stamps, each having a stem and stamp-head, as in the straight batteries, are connected with a central driving-shaft, and are thus moved up these inclined planes, from the top of which they fall upon the dies at the base. The stamp-stems move in a. frame or guide provided withufrichien-rollers. Screens are placed around the outercircumfcrence of the apparatus, through which the pulver-ized ore passes. The inclined planes are adjustable by wedges and screws, and are easily replaced when worn out. To more ful/ly explain my invention, reference is had to the accompanying drawings, forminga part of this specification, of which- Figure 1 isa side elevation of my machine, showing one stamp.

Figure 2 is a sectional elevation of the stamp-guide, showing tlic friction-rollers.

Figure 3 is `a plan of the base, showing the inclined plane.

Similar letters of reference in each ot' the figures indicate like parts.

A is a circular base, of a size suiiicient for the stamps to be used, and having four or more inclined planes, B B, around thc circumference, and outside the central boss, D. These rplanes are adjustable, and can be raised or lowered, or may have a greater or less inclination given them by the use of thin metallic er wooden plates,` a a a. The upper face, d, of the plane is made of hard iron, and yisV kept in place, as well as the adjustable. plates, by bolts b b. A die, E, is .placed at the foot of. each plane, upon which the stamp falls when it has passed off the upper endet` the plane. Slots'e e, around the circumference of the machine, serve to admit and i hold metal screens, of any-degree of ineness, through which the ore, when suiciently pulverized, may pass. A driving-shaft, F, passes up through the central boss' D, and has arms, or other suitable device, which serve to drive the stamps. At the extremities of the arms are the guide-frames, G, which-are firmly fastened at such an inclination as to insure the most. efficient stroke oi' the stamp upon the die, as well as to give the best results of the grinding upon the planes. Ways or guides, H II, are constructed within the frames G, upon and between which the frietion-rollcrs I I travel. These rollers have their axles attached to a block, J, through which the stem K passes, and turns freely, boing kept in place by the collar L. The upper part of the stem may also be guided by rollers, o r it may pass through a guiding-collar, as shown at M. The stamp N is fastened tothe stem in the usual manner, or it may have an elastic block, of wood or rubber, O, intervening, to preserve the rollers I from concussion.

. To operate my machine, theorc is placed in the truck of the stamps and upon the dies, and the machine set in motion. The stamps pass up the inclined planes, grinding the tino ore as they move, until they reach the top ofthe plane, when they fall upon the ore, which is collected upon the die, and .then move up the next plane, carrying whatever orc muy be in front of theiuover upon the.ncxtdie, and thus grinding and crushing until the whole mass is fine enough to pass through the screens, Any suitable number oi stamps may be used, and dry or wet crushing may be performed, as desired, while 'the whole machine, being very compact and firm, can be set up in any place with but little trouble.

Having thus described my invcntion\\"hat I claim, and desire to secure by Letters Patent, is-

1. An ore-Crusher, having the spiral inclined planes B B, together with the stumps N and dies E, the whole constructed and operating substantially' as and for the purpose herein described.

2. In a circular Crusher and grinder, I claim the inclined planes, consisting of the removablel grindingplates I) and the adjusting-plates c a a,- substantially as and for the purpose described.

In witness whereof, I have hereunto set my hand and seal. v

SEYMOUR' HUGHES. k[L s] Witnesses:

`C. W. M. SMITH,

JNO. L. BOONE. 

